Also, it's very possible to let the locksmith come to you instead of the other way around. Look for the following things when checking on a locksmith: their company name, a guaranteed quote, their main office location, and an available website.
You can contact a locksmith to get the quote. And while doing so remember to call a reputed locksmith company only.
The "Key" to the whole thing is getting it out of the lock, a locksmith or dealer will simply give you a new key. You might have to remove the whole lock by taking the inside panel of the door off assuming you can get in the car, ( You didn't mention that) How do you plan on getting the key out?
I can get into the car, only because the key is broken inside. By using the other half it allows me to turn the lock so it opens... im figuring I could try getting it out by using tweezers or very thin pliers.
I have a 1998 infiniti i30, and the key to unlock the door snapped inside the lock. So I half the key is in the lock and other half on my keychain. If I were to get the half out of the car door, and bring both halves to a locksmith, about how much would that cost?